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Myerson RJ, Garofalo MC, El Naqa I, et al. Int J Radiat Oncol Biol Phys. 2009
CTVB: external iliac nodal region
Cranial:
• Bifurcation of the common iliac vessels into external/internal
iliacs
(bony landmark: sacral promontory)
Anterior-medial:
0.7-0.8 cm around the vessels
>1 cm antero-laterally in case of small vessels or nodes are
identified in this area
Lateral:
Muscles and pelvic bones
Posterior:
CTVA
Caudal:
caudad edge of internal obturator vessels
(bony landmark: upper edge of
the superior rami pubic)
Obturator artery